/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.naming.factory;

import org.apache.naming.EjbRef;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.Name;
import javax.naming.Reference;
import javax.naming.RefAddr;
import javax.naming.spi.ObjectFactory;
import java.util.Hashtable;
import java.util.Properties;

/**
 * Object factory for EJBs.
 * 
 * @author Jacek Laskowski
 * @author Remy Maucherat
 * @version $Id: OpenEjbFactory.java 939511 2010-04-29 23:48:20Z kkolinko $
 */
public class OpenEjbFactory implements ObjectFactory {

	// -------------------------------------------------------------- Constants

	protected static final String DEFAULT_OPENEJB_FACTORY = "org.openejb.client.LocalInitialContextFactory";

	// -------------------------------------------------- ObjectFactory Methods

	/**
	 * Crete a new EJB instance using OpenEJB.
	 * 
	 * @param obj
	 *            The reference object describing the DataSource
	 */
	public Object getObjectInstance(Object obj, Name name, Context nameCtx,
			Hashtable environment) throws Exception {

		Object beanObj = null;

		if (obj instanceof EjbRef) {

			Reference ref = (Reference) obj;

			String factory = DEFAULT_OPENEJB_FACTORY;
			RefAddr factoryRefAddr = ref.get("openejb.factory");
			if (factoryRefAddr != null) {
				// Retrieving the OpenEJB factory
				factory = factoryRefAddr.getContent().toString();
			}

			Properties env = new Properties();
			env.put(Context.INITIAL_CONTEXT_FACTORY, factory);

			RefAddr linkRefAddr = ref.get("openejb.link");
			if (linkRefAddr != null) {
				String ejbLink = linkRefAddr.getContent().toString();
				beanObj = (new InitialContext(env)).lookup(ejbLink);
			}

		}

		return beanObj;

	}

}
